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| Structural Steel Frame, Side Elevation |
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| Structural Steel Frame, Rear Elevation |
The structural core of the building is a steel frame which runs throughout its shape. Because each face of the building is a triangular, the main framework is naturally divided into a series of triangles, affording the structure a good degree of rigidity. These triangular sections are reinforced with further supporting framework[1] and then structural plywood is bolted to either side, locking the whole frame firmly in place. The framework is 300mm thick to allow this much insulation between[2].
Section showing the Foundations
A concrtete foundation attaches the frame to the ground with an inset steel locking system which the frame is designed to fit[1]. The frame had been prefabricated in two main parts previouslty in Bolton and was assembled overnight[2].
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| Gaps in exterior cladding showing attaching rivets, left in the Trespa and in the steel to the right |
On top of the plywood, the entire structure is wrapped in a waterproof membrane[3], then the exterior steel cladding is rivetted to the outer plywood and the yellow Trespa to the reverse. The glass at the front enters the structure through the meeting of the steel and Trespa and at gaps between the Trespa panels and falls down seamlessly into the floor.
References
1. http://www.makearchitects.com/#/projects/0022/ - 24/10/2010
2. http://www.designbuild-network.com/projects/st-pauls/ - 24/10/2010
3. Architectural Tour of “The City of London Information Centre” - 2/11/2010All images are our own.
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